//
//  MainTabBar.swift
//  Sina
//
//  Created by 王杰 on 15/11/11.
//  Copyright © 2015年 王杰. All rights reserved.
//

import UIKit
//自定义UITabBar
class MainTabBar: UITabBar {

    override init(frame: CGRect) {
        
        super.init(frame: frame)
        
        setupUI()
    }

    required init?(coder aDecoder: NSCoder) {
        
//        fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        setupUI()

    }
    
    private func setupUI() {
    
    addSubview(composeBtn)
    
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let w = self.bounds.width/5
        let h = self.bounds.height
        
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index : CGFloat = 0
        
        for subView in subviews {
        
            if subView.isKindOfClass(NSClassFromString("UITabBarButton")!) {
            
            subView.frame = CGRectOffset(rect, index * w, 0)
                
                index += index == 1 ? 2 : 1
            }
        }
        composeBtn.frame = CGRectOffset(rect, 2 * w, -20)
        bringSubviewToFront(composeBtn)
    }
    lazy var composeBtn: UIButton = {
        
        let btn = UIButton ()
        
        btn .setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: .Normal)
        btn .setBackgroundImage((UIImage(named: "tabbar_compose_button_highlighted")), forState: .Highlighted)
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: .Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
        return btn
    }()

}
